import math
weight = float(input("请输入体重(kg)："))
height = float(input("请输入身高(m)："))
BMI = weight / pow(height, 2)
if BMI < 18.5:
    a, b = "偏瘦", "偏瘦"
elif 18.5 <= BMI <= 24:
    a, b = "正常", "正常"
elif 24 < BMI <25:
    a, b = "正常", "偏胖"
elif 25 <= BMI < 28:
    a, b = "偏胖", "偏胖"
elif 28 <= BMI < 30:
    a, b = "偏胖", "肥胖"
else:
    a, b = "肥胖", "肥胖"
print("BMI指标为{}：国际{}，国内{}".format(BMI, a, b))